Tig?

Where does this girl's name come from? Is it short for something? My daughter loves Woolly and Tig on Cbeebies and it makes me wonder every time I watch it. The family in it are Scottish...is it a gaelic/scottish name?

Tig in the program's real name is Betsy but I thought maybe they took Taggart (her real father who is also plays her dad on the show is Taggart) and as a 'show biz' joke changed it to Tig for her. FYI her real aunt plays her mom and her big sister is her 'narrator'

Thanks all. I think it's quite a cute name for a child but you'd definitely need a longer version for when you're an adult. The child on the TV program is very, very cute and definitely suits the name.